Aubrey, H. G., & Darmstadter, J. (1961). Introduct: Economic challenge and response. National Planning Association.
Chicago-viite (17. p.)Aubrey, Henry G., ja Joel Darmstadter. Introduct: Economic Challenge and Response. Washington: National Planning Association, 1961.
MLA-viite (9. p.)Aubrey, Henry G., ja Joel Darmstadter. Introduct: Economic Challenge and Response. National Planning Association, 1961.
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